Disphenoid
复正方楔; 双半面晶形
🗣️ 情景例句
What's that?
那是什么？
Please excuse me.
不好意思，请让一下。
you are conditioned by the conventions of the community to such a degree that it is very difficult to conceive of anything really destructive.
社团的风俗习惯会严格地制约你，使你很难有破坏性的想法。